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Analog Devices Inc. LT2179CS#PBF
- Part No.:
- LT2179CS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT2179CS#PBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,365
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Product details
Overview
LT2179CS#PBF from Analog Devices (formerly Linear Technology) is a micropower quad precision operational amplifier optimized for single-supply operation at 5V, featuring 17μA max supply current per amplifier, 70μV max input offset voltage, and 250pA max input offset current. It enables high-accuracy signal conditioning in battery-powered remote sensors and portable instrumentation where ultra-low power and ground-swing output capability are critical.
For engineers reviewing the LT2179CS#PBF datasheet, LT2179CS#PBF pinout, LT2179CS#PBF application, or LT2179CS#PBF equivalent, this page delivers verified specifications including 0.9μVP-P voltage noise (0.1Hz–10Hz), 85kHz gain bandwidth product, and true rail-to-ground output sinking - all confirmed for the 14-pin SOIC package with 0°C to 70°C commercial temperature range.
Technical Context
The LT2179CS#PBF employs an all-NPN output stage enabling output swing to within millivolts of ground while sinking current, eliminating need for pull-down resistors. Its input stage uses matched transistor pairs to achieve low offset drift (0.5μV/°C typical) and picoampere-level input bias current (5nA max), supporting megohm-source applications without significant error.
Designed for single-supply systems as low as one lithium cell or two NiCd batteries, it maintains precision performance across supply voltages from 2.2V to ±15V. The device's 1.5pAP-P current noise and 0.9μVP-P voltage noise (0.1Hz–10Hz) are specified under 5V/0V conditions and validated over the full commercial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current per Amplifier | 17μA max - enables multi-year battery life in always-on sensor nodes |
| Input Offset Voltage | 70μV max - supports sub-0.1% accuracy in 12-bit data acquisition systems |
| Input Offset Current | 250pA max - permits use with >1MΩ source impedances without gain error |
| Voltage Noise | 0.9μVP-P (0.1Hz–10Hz) - critical for low-frequency thermocouple and strain gauge amplification |
| Gain Bandwidth Product | 85kHz - sufficient for anti-aliasing filters and DC-coupled sensor interfaces |
| Slew Rate | 0.04V/μs - adequate for slow-varying industrial process signals |
| Output Sink Current | 5mA - drives LEDs, analog switches, or logic inputs directly without external buffers |
Pinout & Package
LT2179CS#PBF is housed in a 14-lead plastic SOIC (narrow 0.150") package, RoHS-compliant and lead-free, rated for 0°C to 70°C operation. Thermal resistance θJA is 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - swings to ground while sinking current; no pull-down required |
| 2 | –IN A | Inverting input of Amp A - high-impedance node (5nA max bias current) |
| 3 | +IN A | Non-inverting input of Amp A - supports input voltage down to –0.3V below V– |
| 4 | V+ | Positive supply rail - operates from 2.2V to ±22V; 5V nominal for single-supply use |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated from other channels; 110dB channel separation |
| 6 | –IN B | Inverting input of Amp B - matched to Amp A for common-mode rejection (90dB min) |
| 7 | OUT B | Amplifier B output - identical sink/source capability to OUT A |
| 8 | OUT D | Amplifier D output - fully independent; shares same V+ and V– rails |
| 9 | –IN D | Inverting input of Amp D - referenced to V–; supports rail-to-rail input common-mode range |
| 10 | +IN D | Non-inverting input of Amp D - compatible with ground-referenced sensor outputs |
| 11 | V– | Negative supply rail - may be connected to ground in single-supply configurations |
| 12 | +IN C | Non-inverting input of Amp C - decoupled layout recommended to minimize crosstalk |
| 13 | –IN C | Inverting input of Amp C - matched pair with +IN C for precision differential gain |
| 14 | OUT C | Amplifier C output - capable of sourcing/sinking 5mA into 2kΩ load |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation from 2.2V | Enables direct interface with Li-ion (3.0–4.2V) or dual NiCd (2.4V) batteries without regulation |
| Input voltage range includes ground | Accepts signals down to –0.3V below V–, simplifying level-shifting in mixed-voltage systems |
| All-NPN output stage | Delivers true ground-swing output while sinking current - eliminates external pull-down resistors and saves PCB area |
| Low 1.5pAP-P current noise (0.1Hz–10Hz) | Preserves signal integrity in high-impedance pH, piezoelectric, or photodiode front-ends |
| 85kHz gain bandwidth with 0.04V/μs slew rate | Stable in unity-gain configuration with capacitive loads up to 12pF; suitable for anti-aliasing and filtering |
Applications
| Remote Sensor Amplifier | Thermocouple Amplifier |
|---|---|
Use Scenario: Amplifying microvolt-level outputs from wireless temperature nodes deployed in HVAC ducts or industrial pipelines. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with offset trimming and low-drift performance over –25°C to +70°C ambient. Use Value: 70μV max VOS and 0.5μV/°C drift ensure <±0.5°C measurement error without software calibration. |
Use Scenario: Cold-junction compensation and linearization of Type-K thermocouples in portable test equipment. IC Role / Device Role / Timing Role: Low-noise, low-bias-current instrumentation amplifier front-end with reference buffer. Use Value: 5nA max input bias current prevents voltage drop across thermocouple wire resistance, preserving accuracy. |
| Micropower Sample-and-Hold | Micropower Filters |
Use Scenario: Ultra-low-power data acquisition in solar-powered environmental monitors sampling soil moisture every 10 minutes. IC Role / Device Role / Timing Role: Hold amplifier with 17μA quiescent current and 0.9μVP-P noise during acquisition phase. Use Value: Sub-10μA total system sleep current achievable when paired with low-leakage hold capacitors. |
Use Scenario: 4th-order Butterworth lowpass filtering (1kHz cutoff) in battery-operated ECG front-ends. IC Role / Device Role / Timing Role: Quad op amp implementing cascaded 2nd-order sections with matched component ratios. Use Value: 85kHz GBW ensures <0.1dB passband ripple; 17μA per amplifier minimizes filter stage power overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT2079CS#PBF | 55μA supply current per amplifier (3.2× higher), 200kHz GBW, 0.07V/μs slew rate | Better dynamic response but 3× higher power; requires larger battery or more frequent charging | Select LT2079CS#PBF only when bandwidth >100kHz or drive strength >10mA is required |
| LT1491ACS#PBF | Rail-to-rail input/output, 50μA supply current, 200kHz GBW, but 250μV VOS max | Wider input common-mode range (–0.4V to 44V), but 3.6× higher offset limits DC accuracy | Choose LT1491ACS#PBF for wide-supply-range systems where rail-to-rail swing outweighs offset sensitivity |
Compared with LT2179CS#PBF, LT2079CS#PBF trades ultra-low power for higher speed, while LT1491ACS#PBF sacrifices DC precision for input/output voltage flexibility - making LT2179CS#PBF optimal for static, battery-constrained, high-accuracy sensing.
Availability
LT2179CS#PBF is available at Aetrix Electronics and suitable for battery-powered systems, portable instrumentation, and remote sensor amplifiers requiring stable component supply with guaranteed long-term availability.
Supply support for LT2179CS#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains its precision analog portfolio, renowned for low-noise, low-power, and high-accuracy signal conditioning ICs used in test equipment, medical devices, and aerospace systems.
The LT2179CS#PBF belongs to Linear Technology's micropower precision op amp family, designed specifically for energy-constrained applications demanding DC accuracy, ground-swing output, and minimal supply current without sacrificing stability or noise performance.
FAQ
What is the maximum operating supply voltage for LT2179CS#PBF?
The LT2179CS#PBF has an absolute maximum supply voltage rating of ±22V. It is fully characterized for reliable operation from 2.2V single supply up to ±15V dual supply. At 5V/0V, it delivers its specified 17μA max supply current per amplifier, 70μV max offset voltage, and 0.9μVP-P voltage noise - all validated across 0°C to 70°C.
Does LT2179CS#PBF support true rail-to-rail input and output?
The LT2179CS#PBF supports rail-to-rail input common-mode range (down to –0.3V below V– and up to 3.5V above V– at 5V supply) and rail-to-ground output swing when sinking current. However, its output does not swing to V+ - maximum high-level output is 4.4V at 5V supply. For full rail-to-rail output, consider alternatives like LT1491ACS#PBF.
Can LT2179CS#PBF drive capacitive loads without oscillation?
Yes - the LT2179CS#PBF is stable driving up to 12pF capacitive loads in unity-gain configuration, as verified in the datasheet's transient response plots (Figures G12–G17). For loads >12pF, a series resistor (≥100Ω) between output and capacitance is recommended to maintain phase margin and prevent peaking or ringing in LT2179CS#PBF-based filter or cable-driving circuits.
What is the thermal performance of LT2179CS#PBF in SOIC-14 package?
The LT2179CS#PBF in 14-lead SOIC package has a junction-to-ambient thermal resistance (θJA) of 150°C/W. With 4 amplifiers drawing 17μA each at 5V (total 340μW dissipation), junction temperature rise is <0.05°C above ambient - negligible for commercial-temperature applications. Maximum junction temperature remains 150°C, allowing safe operation up to 70°C ambient with standard PCB copper area.
How does LT2179CS#PBF compare to LT2178CS#PBF in pin compatibility?
The LT2179CS#PBF (14-pin SOIC) and LT2178CS#PBF (8-pin SOIC) are not pin-compatible - the LT2179CS#PBF provides four independent amplifiers with dedicated pins for each input/output, while the LT2178CS#PBF integrates only two. Their pinouts differ entirely; board redesign is required to substitute one for the other. Both share identical electrical specs per amplifier and SOIC packaging standards.
LT2179CS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.04V/µs
- Gain Bandwidth Product:
- 85 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 17µA (x4 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LT2179CS#PBF FAQ
1.How can I place an order for LT2179CS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT2179CS#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT2179CS#PBF reliable?
The price and inventory of LT2179CS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT2179CS#PBF is usually 5 days.
3.What payment methods are accepted for LT2179CS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT2179CS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT2179CS#PBF?
LT2179CS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT2179CS#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT2179CS#PBF?
For technical support, including LT2179CS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT2179CS#PBF requirements.
6.How does Aetrix verify that LT2179CS#PBF is sourced from the original manufacturer or authorized distributors?
All LT2179CS#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT2179CS#PBF meets industry standards.
7.What is the process for return or replacement of LT2179CS#PBF?
All LT2179CS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT2179CS#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT2179CS#PBF part is unused and in its original packaging.
Return procedure for LT2179CS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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